Low temperature dry reforming of methane using Ru-Ni-Mg/ceria-zirconia catalysts: Effect of Ru loading and reduction temperature

Yetunde Sokefun, James Trottier, Matthew Yung, Babu Joseph, John Kuhn

Research output: Contribution to journalArticlepeer-review

10 Scopus Citations

Abstract

Dry reforming catalysts, especially those with activity at moderate temperatures, have been intensely investigated to enhance the conversion of biogas. Here, Ru is evaluated as a promoter for Ni-Mg based catalysts. Catalysts based on 1.4 wt%Ni-1.0 wt%Mg-Ce0.6Zr0.4O2 with Ru (0.02–0.32 wt%) were prepared using incipient wetness. The reducibility of the catalysts and conversions increased with increasing Ru content. Increases in conversions with increasing Ru loading was attributed to the additional active sites and synergistic effect between Ru and Ni, which weakened Ni-Mg interactions. Samples showed dry reforming activity at low temperatures (450–510 °C). Reaction rates and activation energies of higher loading Ru samples (1.4 wt%Ni-1.0 wt%Mg/Ce0.6Zr0.4 O2 with 0.16 and 0.32 wt%Ru) decreased when the reduction temperature was raised from 300 to 400 °C. A 20 h TOS study showed stable catalytic activity with minimal coke deposition. The results suggest that Ru is an alternative to Pt in promoting low temperature dry reforming of methane.

Original languageAmerican English
Article number118842
Number of pages13
JournalApplied Catalysis A: General
Volume645
DOIs
StatePublished - 2022

Bibliographical note

Publisher Copyright:
© 2022 Elsevier B.V.

NREL Publication Number

  • NREL/JA-5100-82918

Keywords

  • Biogas conversion
  • Low temperature dry reforming
  • Metal loading
  • Reduction temperature
  • Ru-Ni-Mg-ceria zirconia catalysts

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